Ignition Coil and Iridium Spark Plugs for BMW 1 Series (2005-2007) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2005-2007 BMW 1 Series

Complete Secondary Ignition Refresh: Replaces fatigued factory ignition coils and worn plugs to eliminate cylinder misfires, rough idling, and hesitation under load across all four cylinders.

The Stock 1 Series Thermal Breakdown

The N46 2.0L inline-4 engine bay experiences extreme thermal cycling within its tight engine compartment. Over time, OEM coil boots degrade, causing dielectric breakdown, micro-arcing, and spark leakage along the cylinder head. Concurrently, factory spark plug gap erosion increases electrical resistance, forcing the primary windings to run hotter and causing premature coil failure, rough cold starts, and intermittent DME misfire codes.

The Engineering Solution

This direct-replacement kit pairs four precision ignition coils featuring high-conductivity internal copper windings with four fine-wire iridium spark plugs. The reinforced silicone boots provide superior resistance to heat soak and dielectric breakdown, while the iridium center electrodes lower the required firing voltage. This ensures rapid flame kernel propagation, complete fuel atomization, and stable ignition timing across the entire RPM band.

Technical Specifications

Compatibility

• 2005 BMW 1 Series (118i, 120i) 2.0L 4-Cylinder
• 2006 BMW 1 Series (118i, 120i) 2.0L 4-Cylinder
• 2007 BMW 1 Series (118i, 120i) 2.0L 4-Cylinder

The BMW Precision Standard

Engineered to match factory DME pulse-width modulation and secondary resistance parameters, this ignition kit guarantees OEM electrical compatibility, precise coil dwell timing, and zero check engine lights.